Signors to the leland



No. 624,508. Patented May 9,1899.

- H. M. LELAND & F. E. FEBRIS.

MACHINE FOR GENERATING TEETH 0F BEVEL GEARS.

(Appucatimmd Feb. s, 189s.) @No Model.) 7 Sheets-Sheet l.

11"/ /WESSL S No. 624,508. Patent-mmay 9,1899. H. M. LELAN|J & F. E. FERms. lMGIIINE FUR GENEHATING .TEETH F BEVEL SEARS.

(Application led Feb.V 3, 1898.) {No Model.) 7 Shets-Sheet 2.

N: Nonms wenn co. moraumo.. WASHINGTON, u c

Noi 624,508. Patented May 9, |899. H M. LELAND & F. E. FERRIS.

MACHINE FUR GENEBATING TEETH 0F BEVEL GEARS.

(Application led F-eb. 3, 189B.)

7 Sheets-Sheet 3.

(No Model.)

I IZWESSES ma Nonms Ferias co. PNoroLn'no., wAsHlNc'ron, D. c,

No. 624,508. Patented May 9, |899.

H. M. LELAND & F. E. FERRIS. 4 MACHINE FUR GENERATING TEETH DF BEVEL GEARS (Application filed Feb, 3, 1898.) (No Model.) 7 Sheets-Sheet 4.

TH: Ncmms PETERS co. worum-mo., wAsmNGToN. n. c.

Patented May 9, |899. H. M. LELAND & F. E. FERms.

MACHINE FQR GENEBATING TEETH 0F BEVEL GEARS.

(Application led Feb. 3, 1898.) (No Model.) 7 Sheets-Sheet 5.

t; IN1/mfom ZIT/VESSEL? No. 624,508. Patented May 9, |899.

H. M. LELAND 8f. F. E. FERRIS.

MACHINE FOR GENERATING TEETH 0F BEVEL GEABS.

(Application led Feb. 3, 1898.) -No Model.) 7 Sheets-Sheet 6.

f I/ By .viomey mj PatentedMay 9, |899.-

H. M. LELAND F. E. FERRIS. MACHINE FOR GENERATING TEETH 0F BEVEL GEARS.

(Application led Feb. 3, 1898.) No Model.) 7 Sheets--Sheet 7.

WJTVESSES M 9/ TN: ohms Ps1-Ens oo, Pnojmmwo., WASHING-IDN, o. c

l UNITED STATES PATENT OFFICE.

HENRY M. LELAND AND FRANK E. FERRIS, OF DTROIT, MICHIGAN, AS- SIGNORS TO THE LELAND t FAULCONER MANUFACTURING COMPANY,

OF SAME PLACE.

. MACHINE FOR GENERATING TEETH OF BEVELGEARS.

SPECIFICATION forming part of Letters Patent No. 624,508, dated May 9, 1899. Application filed February 3, 1898. Serial No. 66 8,931. (No model.)

To all whom, t may concern:l

Be it known that we, HENRY M. LELAND and FRAK E. FERRIS, citizens ot' the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvementin Machines for Generating Teeth of Bevel-Gears; and we declare the following to be a full, clear, and exact description of the invention, such as ro will enable others skilled in the art to which it appertains to make and use-the same, reference being had to the accompanying drawings, which form a part of this speciti'cation. Our invention has for its object a novel process and machinefor forming or generating the teeth of bevel-gears.

Ourinvention more particularly has i'n view the generation of bevel-gears for chaiuless bicycles, although we do not limit ourselves zo `solely thereto. It is well understood that great difficulty has heretofore been experienced in accurately and economically forming bevel-gears, especially for this purpose. That the teeth of bevel-gears cannot be accurately milled hasv heretofore been pointed out as a very serious obstacle to the practical success of gears of this class in supplanting the chain-driven gear.

It is well known that it has been customary 5o to form and accurately iinish the teeth of bevel-gears from iron or soft steel and then to subject the gears to the proper hardening process; but it has beenv found that however perfect the teeth may have been formed and finished in the soft met-al when these gears have been subjected to the process of heating and hardening the required accuracy and perfection have been destroyed and the working faces or surfaces of the teeth are not concentric with the axis of the gears and the spacing and form of the teeth are untrue and imperfect, and consequently useless'for the purposes above mentioned. Ourinvention, however, contemplates formingthe gears approximately correct by ordinary meansin soft steel or in the soft iron and then correcting both the original errors in the form of teeth cut by milling-cutters or other means and the errors resulting from heating andhardening them,

and by this means to generate bevel-gears 5o that shall be perfect and true after being hardened, and thus securing a product heretofore unknown to the art. It is obvious that after the gears have been properlyhardened a milling-tool or other ordinary means conimonly used in forming the teeth of bevelgears can no longer be employed in the correction of the errors above mentioned, so that other means must be found adapted to correcting and truing the gears after they have 6o been hardened in order to carry out our improved process. We accomplish this result by means ofa suitable grinding-wheel adapted to act upon the hardened gears in such a manner as to correct all errors in the teeth after the gears have been hardened,and so render the completed gears perfect, thereby preventing waste, promoting economy, and securing superior utility and eiiiciency and rendering theapplication of bevel-gears to bicy- 7o cles more practicable and satisfactory than has heretofore been-the case.

To these ends our invention consists of the process and mechanism herein described and claimed, and illustrated in the accompanying Figure lis a side elevation. Fig. 2 is a plan View. Fig. 3 is a rear elevation. Fig. 4 is a detail view in elevation of the indexing mechanism. Fig. 5 is a detail View, in side 8c elevation, of the same. Fig. (i is a detail View in plan, illustrating the same. Fig. 7 is a AView of the cam for moving the grindingwheel toward and away from the gear. Fig. 8 is an enlarged front elevation showing the 85 slide that carries the grinding-wheel. Fig. 9 is aview in section on the line 9 9, Fig. A8. Fig. l0 is a detail View showing the former and the mechanism contacting therewith.

Fig. l1 is a view of the same at right angles 9o to Fig. 10.` Fig. l2 is an inverted plan of the same. Fig. 13 is a detail View of the cam for reciprocating the grinding-wheel. Fig. 14 is a detail view illustrating the changed position of the grinding-wheel to grind on the adjacent faces of the two adjacentteeth. Fig. l5 is a detail view showing devices for locking the micrometer-screws R2. Fig. 16 is an view of the same.

enlarged plan View of the device for holding the former against the roll. Fig. 17 is an enlarged View of the same in side elevation.

- Fig. 18 is a detail view in elevation, showing the device for setting or testing the adjustment of the grinding-wheel. Fig. 19 is a plan Fig. 2O is an end view of the mechanism illustrated in Fig. S.

In the drawings, A represents any suitable support or frame.

B denotes an arbor to carry a bevel-gear, (indicated at B'.) The gear is held upon the arbor in any suitable manner. The arbor B is engaged in a spindle B2 in any suitable manner. For example, said spindle may be constructed'with an orificeto receive the adjacent end of the arbor, as indicated by the dotted lines at B4, Fig. 1. B2 is an indexplate to space the teeth, said plate carried on the spindle B2, and by means of which said spindle,with the arbor, is rotated step by step. The spindle and arbor are given a rocking movement by means of an oscillatory arm B, carrying at its outer end a former B7, said former bein g an enlarged reproduction or pattern approximating the form of a correct tooth upon the gear or so shaped asv to give a correct form to the teeth of the gear in the operation of the'machine. The bearing B5 of the spindle B2 is provided with forks b b at its forward end, said forks fulcrumed, as indicated at ZJ', in line with the cone center of the gear, the cone center being indicated at the intersection of the dotted lines in Fig. 2, as at Q. The bearing B5 is also carried rearward toward the opposite end of the spindle B2, as shown more particularly in Fig. 1. The rear end of the bearing is secured in any suitable manner upon a quadrant B8, as by bolts b2, entering a T-shaped slot b4 in the quadrant. The quadrant B8 is formed with a guide-arm B10, in which the outer end of the lever D is guided, as indicated more particularly in Fig. 2. The guide-arm B40 is provided vrith a gib b5.

The support or frame A is provided with brackets, (indicated at (1.,) upon which said forks are fulcrumed. By this means the arbor is oscillated upon said fulcrum-points b', as may be required, to bring gears ot' different sizes and angles into proper position.

C is a rotatable grinding-wheel, made of any suitable material and having a reciprocatory movement on the cone line of the gear.

C' is the shaft of the grinding-wheel, which may be driven by any suitable device, as by a pulley C2 thereupon actuated from any suitable source of power.

D is a lever made oscillatory on line with` the cone center of the gearand provided with a slide D', carrying the grindingwheel. Said lever is fulcrumed, as indicated. at d, in line with the cone center of the gear and is provided with ways cl', in which a slide D', carrying the grinding-wheel, reciprocates.

j Y The slide D is provided with a suitable housing D2 to carry the shaft C of the grindingwheel. To reciprocate the slide D', carrying the grinding-wheel on the cone line of the gear, any suitable means may be provided, as a cam E, upon a rotatable shaft E, which is driven by a pulley E2, which may be belted with any suitable source of power, as with a counter-shaft. The slide D is provided with a .cam-roll d2, projecting into a suitable camgroove e of the cam E. (Shown in Fig. 13.) The lever D, carrying the slide and the grinding-wheel, is also given an oscillatory movement to carry the grinding-wheel toward and away from the bevel-gear-as, for example, when the gear is to be rotated. This oscillatory movement may be accomplished in any suitable manner, as by a cam F upon a shaft f, the cam Fbeing indicated in detail in Fig. 7. The lever D is provided with a cam-roll F. The shaftfis preferably actuated by a gear F', meshing with a pinion F2 upon a shaftf2, which latter shaft may be driven in any suitable manner, as by a pulley F3, which may be belted to a counter-shaft. The pinion F2 is interposed to reducethe speed of the shaftfand cam F.

D3 is an oscillatory arm pivoted,y as indicated at d4, upon an extended portion of the ylever D, said arm D3 carrying a roll, (indicated at D4,) said roll contacting with the former B7. adjacent to the former, is carried downward or toward the spindle B2 by means of the cam F, as hereinbefore described, the roll D4 will travel about the edge of the former, giving a corresponding oscillatory movement to the arm B6 and a rocking movement to the spindle B2. By this means it will be evident that the tooth being operated upon by the grinding-wheel will be given a rocking movement to secure the proper curvature of. the tooth in the action oflthe grinding-wheel thereupon. It will be understood that the grinding-wheel contacts with the tooth in operation on the edge of the wheel, asindicated in Fig. 14, for example, and by thus rocking the gear the proper curvature to each tooth will thereby be secured in a perfect manner.. The parts are so arranged that the roll D4 will always contact with the former on aline passing through the cone center, said line being indicated by the single arrow-head. As the parts are located in the machine illustrated in the drawings this line is in a vertical plane. It might, however, be in any other desired plane. It will be evident from Fig. 3, for example, that when the end of the lever D is lifted so as to carry the grindingwheel away from the gear the arm D3, with the roll D4, will be carried into position, (indicated in-dotted lines in Fig. 3,) the roll D4 being in position, whereby the operator may oscillate the arm D3 to either side the line indicated by the single arrow-head, so as to contact as it descends with either edge d3, projecting into a cam-groovef' of the cam 1 As the outer end of the lever D,

IOC

IIO

l grinding-wheel.

will be on said line, whereby the grindingwheel may be guided to act -on either side a given tooth, as may be desired. The center of the arbor carrying the gear is also on the line indicated by the single arrow-head, as is also the contacting or grinding edge of the It will be observed thatthe spindle carrying the index-plate B3 also has its center on said lin e.l When the roll D4 is lifted, a step-by-step rotation .is given to the spindle B2 and the arbor carried thereby to turn the gear B' from one tooth-space to another. When so moved, the index-plate is locked in its relation to the former. The index-plate is spaced or toothed accurately on its periphery, as shown, to correspond with gears having the same number of teethor multiples thereof, the index-plate being interchangeable on the spindle B2, so that an index-plate corresponding to any given gear to be formed may be engaged upon said spindle. The index-plate is provided with a-ratchetwheel, (indicated at G,) with which engages a pawl G to give rotation to said plate. The pawl is carried by a bar G2, having an adjustable engagement upon a slide G3, as indicated at g. The slide G3 reciprocates upon a guide G4, carried by or integral with the bearin g B5. The slide G2 is actuated by a lever H, fulcrumed to the bearing B5, as indicated at Zz, its opposite end engaging a collar H upon a shaft H2, forming the .pivot for the adjacent portion of the forks Z) of said bearing, and upon which pivots the adjacent portion of said fork is fulcrumed, as indicated at b', as hereinbefore described. The 'longitudinal center of the shaft H2 is on a line passing through the cone center of the gear, which line is indicated in the drawings by the dou- 'ble arrow-heads and intersects at the cone center the line indicated by the single arrowhead. Engaging said collar H is an additional lever H2, which is fulcrumed, as shown at Zt, to the support A, the opposite endof the lever H3 engaging a cam-groove j of a cam J, engaged upon the shaft f, which carries the cam F. The cam F is provided with a concentric portion, as shown in Fig. 7, the parts being' so arranged that when the cam F is raised the adjacent end of the lever D and the cam-roll of said lever will ride in said concentric portion of thecamgroove, during which time, obviously, the lever is at rest. Meanwhile the cam J actuates the lever H3, shifting the collar H on the shaft H2, thereby shifting the lever H and actuating the slide G3 to actuat'e the pawl G' to correspondingly actuate the ratchet-wheel G. The opposite movement of the related parts will of course retract the slide G3 and the pawl G. To regulate the throw of the pawl or its engagement with the ratchet-wheeLa governing-slide g may be employed, which may be carried by the guide G4. The slide g may be held in place by a screw g2 and may be so adjusted that when the pawl is retracted it will lift the pawl out of engagement with the ratchet-wheel and will obviously prevent the pawl from engaging the ratchet-wheel in the opposite movement thereof until the end of the pawl has passed beyond the end of said slide. In this manner the engagementof the pawl with the 'ratchet-wheel may be governed as may be desired to throw the ratchet-wheel to approximately the correct position.

To accurately locate the indeX-plate,a pl unger K is provided to engage any given. space upon the periphery of the index-plate. The

, adjacent end of said plunger is wedge-shaped,

so as to readily engage la given space upon said plate. The plunger is carried by an arm K, sleeved uponthe spindle B2, and uponv which 'arm K the former-arm B4 is secured, as by bolts Zt. The former-arm B6, with its former,is made interchangeable, as a different-shaped former will be required on different gears, and by uniting the'former-arm .B4 to the arm K it may readily be interchanged as desired. The plunger K may be actuated inthe following manner:

L is an oscillatory arm fulcrumed, as at Z, upon the slide G3, said arm formed with a projecting cam-flange portion Z. L2denotes a bell-crank fulcrumed, as at Z2, to the guide G4. The bell-crank L2 is provided at one extremity with a shoulder Z4 to engage the camilange Z. The opposite endvof the bell-crank is engaged with a plunger-bar K2., As shown in Fig. 6, the plunger K and the plunger-bar K2 have a toothed engagement the one with the other in such a manner that as the plunger-bar K2 is reciprocated in the actuation of the bell-crank L2 the plungerKmay be forced out of engagement with the index-plate, a retracting-spring K3 restoring the plungerinto engagement with thev index-plate. It will also be observedA that the toothed engagement of the plunger with the plunger-bar is such that when the arm K is oscillated by means of the plunger-arm B4i the plunger K may readily ride out of engagement with theplunger-bar K2, the plunger remaining in locked position in relation to the index-plate. A spring K4 serves to retract'the plunger-bar K2 into normal4 position. Adjusting-nuts K5, bearing against a bracket K6, serve to adj ust the position of the plunger-bar. As the oscillatory arm Lis reciprocated or carried backward and forward upon the slide G3 the shoulder Z4 upon one movement of the slide L will obviously ride under the cam-flange Z' and there past, the opposite movement of tqhe arm L causing the shoulder Z4 to ride upon the upper or opposite edge of the cam-flange Z. In the position shown in Fig. 4t the iirst movement ofthe slide G3 will obviously cause the shoulder Z4 to ride under the cam-flange Z', thereby tilting the slide L without actuating the bell-crank. After the arm L has retracted beyond the shoulder Z4. the yopposite movement of the slide Gswill cause theshoulderZ4 to ride upon the upper edge of the cam- ICO gagement with the ratchet G.

ange, thereby tilting the bell-crank L2 to retract the plunger-bar K2 and the plunger K. A spring 705 serves to retract the arm L.

The arm K- preferably has a divided bearin on a sleeve or bushinrrB9 u on the s inlle B2, said sleeve or bushing having a fixed engagement with the bearing B5. A spring g3 serves to keep the pawl G into normalenln order to removably engage the index-plate in place upon the spindle B2, said spindle may be provided With a flange, (indicated at M.) The ratchet-wheel G may be formed, as of a ring, integral with the index-plate to set over the llange M. The index-plate is also provided with a suitable number of arc-shaped slots, (indicated at 172,) through which screws m may be passed, engaging the index-plate with the flange M. By removing said screws the plate,with its ratchet-wheel or ring,may readily be detached from the spindle. By means of said arc-shaped slot also the index-plate when applied to the flange M may be turned into proper position to aline the teeth of the index-plate with the teeth of the gear to be ground.

When the arm D3 has been adjusted into desired position, as hereinbefore described, it may be locked upon the projecting end of the lever-arm D by means of a suitable latch or spring-plunger, (indicated at d6.)

By making the cam E, as indicated in Fig. 3, with a heart-shaped cam-groove e the slide upon the lever D, carrying the grindingwheel, will be reciprocated with uniform speed. The oscillatory arm D3 is guided, as shown at d8, in its oscillation upon a gib d?,

, secured upon the lever D. Upon the end of the lever D, adjacent to the arm D2, are engaged stop-plates N, which may be secured in place by screws n. The arm D3 is provided lwith a pin (indicated at N) to contact with the stop-plates N. As the arm D3 is shifted upon either side of the former, as hereinbefore explained, the stop N', striking against the corresponding stop-plateN, will bring the periphery of the roll D4 upon the line indicated by the single arrow-head hereinbefore described.

To keep the former in contact with the roll D4 and to bring the point of the former to a central position on a line passing th rough the cone center when the roll -is not acting thereupon, any suitable means may be providedas, for example, the guide P, secured to the frame of the machine and carrying slides P' P2, each of said slides carrying a sheave Ap. P3 is a connecting-rod suitably connected at one end wit-h the arm of the former and at the other' end with a sliding stud p', reciprocatory in said guide and arranged to contact with either of said slides,and thereby actuate said slides i-n a corresponding direction. To

yone of the slides is attached a cord P4, said `cord running over said sheaves and attached at its opposite end to a spring, as indicated at P5. Obviously a weight might be substituted for the spring, if desired. PG is a stop located intermediate the ends of the guide between the adjacent ends of said slides to limit the inward movements of said slides. Vhen the former -is moved away from the line passing through the cone center in either direction, the connecting-rod P8 will be moved in a corresponding direction, causing the sliding stud p to contact with the corresponding slide to move said slide and take up the cord. In so doing the spring is obviously extended, and when extended will retract the corresponding slide when free to move. In this manner lthe former will be held properly in contact with said roll and on said center line when the roll is out of contact therewith.

The front end of the slide D is provided with a transverse guide dw, upon which is a ing engagement therewith, said cross-head constructed with a hub r.

R is a guide carrying the housing D2, hereinbefore mentioned, which housing carries the grinding-wheel. The cross-head R islimited in its travel by means of stop-screws R2, the same being preferably micrometer adjusting-screws to accurately limit the lateral adjustment of the grinding-Wheel carried by said housing, so as to bring the cutting edge of the grinding-wheel upon the center line indicated by the single arrow-head passing through the cone. center of the gear. The screws R2 are locked in their adjustment in any suitable manner, as by means of plugs r engaging the threads of said screws, lockingscrews r2 being engaged upon said plugs. By this means the grinding-wheel may be laterally adjusted with greatest accuracy. The ends of the micrometer-screws preferably enter recesses r3 in the hub ot' the cross-head,

said recesses forming ahousing to protect the llaterally-reciprocatory cross-head R, in slid- IOO IIO

R4 is a bolt securing the guide R to the l cross-head R. Said cross-head is formed with an arc-shaped slot R5, through which the bolt R4 passes. The guide R has projecting tongues r4 projecting into the arc-shaped slot R5. By this means the guide R may be tilted in the arc of a circle in said arc-shaped slot R5 to tilt the grinding-wheel, and thereby produce the necessary clearance of the wheel in its operation upon the teeth and the gear, as illustrated more specifically in Fig. 14, to shape the teeth of the gear in required form. Upon the end of the bolt R4 is a nut R6, actuated by a lever R7, for tightening the bolt to lock the guide R to the cross-head R.

R8 is a screw for traversing and holding the cross-head in contact against the micrometerscrews.

To give the housing D2 a vertical movement on the guide R4, a screw S may be employed, said screw preferably being a micrometerscrew, to vertically adj ust the grinding-wheel, so that as said grinding-Wheel reciprocates it IZO recess t3.

will reciprocate on a line passing. through the cone center. The guide R `is provided with a plate r6, through which said screw passes, the screw being shouldered upon said plate and also threaded into the housing carrying the grinding-wheel. By this means as the screw is adjusted the housing will move on the guide R. By this means the grindingwheel may be vertically adjusted to any required adjustment-as, for example, to compensate for any wear' upon the grinding- Wheel, as well as from any other canse.

To insure the grinding-wheel being accurately adjusted or set so that its cutting edge will be upon a cone line of the gear both vertically and horizontally, a bracket T may be employed. The ends d CX12 of the lever D, forming the bearings on the shaft H2, may be provided the one with V-shaped grooves (indicated at t) and with threaded sockets (indicated at t) to receive a clamping-screw T', passed loosely through the bracket and having a clamping-collar t2. At the opposite end the bracket is secured upon the portion CP2 by a clam pin g-screw T2, entering the threaded The end of the bracket adjacent to the grinding-wheel when in place is provided with a longitudinal straight-edge or tongue T4, either lateral face of which might be located on the line indicated by the single arrow-head passing through the cone center of the gear and to which line the grindingwheel is to be adjusted. The bracket adjacent to the grinding-wheel is also constructed with horizontal shoulders t4, said shoulders when in place being on a cone line indicated by the triple arrow-heads in Fig. 1S. The bracket is constructed with a V-shaped lug (indicated at 155) to enter and locate in the grooves t of the part du. It will be evident that when said lug i5 has entered the righthand groove shown in Fig. 18 one lateral face of the tongue T4 will be on the line indicated by the single arrow-head and the shoulder t4 thereabove will be on a horizontal lineindicated by the triple arrow-heads. l/Vhen the lug t5 engages in the left-hand groove shown iu Fig. 18, the opposite lateral face of the tongue TJl will be on the line indicated by the single arrow-head and the horizontal shoulder thereabove will be on the line of the triple` arrow-heads. By means of a straight-edge or parallel piece T5 the operator may readilytest the position of the grinding edge of the grinding-wheel by applying said parallel piece against the tongue and corresponding shoulder ofV the bracket.

In the operation of the machine the operator puts the bevel-gear upon the arbor and properly alines it into proper relation to t-he teeth of the index-wheel. It will be obvious that the grinding.- wheel must be speeded faster than other parts of the machine and that the wheel must. be set into rotation before the other parts .begin to move. The lever D will be given an oscillatory movement and the gri nding-wheel areciprocatory movement on the cone line of the gear simultaneously. It will be evident that thereby the former will be caused to act to rock or partially rotate the arbor carrying the gear, for thepurposes hereinbefore mentioned. In due succession a vertical reciprocation will also 'be given to the grinding-wheel, and when said the grin ding-wheel has a rotary movement, a t

reciprocatory movement on the cone line of the gear, a verticalmovement, and a swivel movement to give clearance thereto in its .work on the side of the teeth of the gear,

while it also may be laterally and vertically adjusted. It will be evident that the bracket T is removable when the machine isiu operation.

It is well known that various things destroy the efficiency of bevel-gears as they have ordinarily been constructed, wherein the gears have been formed and finished of soft metal and then hardened by heating and cooling the same-as, for example, the working surfaces of the teeth have been thrown out of concentricity with the axis. There is also a winding or twisting or warping of the faces of the gear as a whole, in consequence of which one tooth may lean in one direction and an adjacent tooth in another direction. So, also, the spacing or pitch of adjacent teeth is changed in the hardening process. In conloo sequence of these changes no bevel-gear can i be made by the ordinary means heretofore in use theoretically or geometrically correct; but by ourimproved process and mechanism the gears may be made both theoretically and geometrically correct and with facility.

What we claim as our invention is-- l. In a machine for generating the teeth of Abevel-gears, means to carry a bevel-gear, a rotatable grinding-wheel reciprocatory on a cone line of the gear in the operation of grinding the gear, and means to direct the position of the teeth of the gear in the operation of grinding the gear to 'give the correct curvature to said teeth, substantially as set forth.

2. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, and a rotatable grinding-wheel having a movement toward and away from the bevel-gear, said grinding-wheel also made reciprocatory on a cone line of the gear in the operation of grinding the gear, and having a movement from the peripheral edge of the tooth toward the axis of the gear, substantially as set forth.

3. In a machine for generating the teeth of bevel-gears, the combination with a rotatable grinding-wheel reciprocatory on a cone line of the gear in the operation of grinding the IIO gear, of a rotatable arbor to carry a gear, means to give to said arbor a step-by-step rotation, and means to rock said arborin the operation of grinding the gear, substantially as set forth.

4. In a machine for generating the teeth of bevel-gears, a device to carry a gear, a rotatable grinding-Wheel reciprocatory on a cone line of the gear in the operation of grinding the gear, and a former to actuate said device, substantially as set forth.

5. In a machine for generating the teeth of bevel-gears, a rotatable arbor to carry a gear, an arm to actuate the arbor, and a non-revoluble former to actuate said arm, substantiaily'as set forth. A

6. In a machine for generating the teeth of bevel-gears, a device to carry a bevel-gear, a rotatable grinding-wheel reciprocatory on a cone line of the gear in the operation of grinding the gear, and means to tilt the grindingwheel in a direction at right angles to the cone line of the gear,substantially as set forth.

7. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a lover oscillatory on ,a line passing through the 'cone center of the gear, and a grindingwheel carried by said lever having a series of reciprocatory movements in the operation ofl grinding the gear, substantially as set forth.

8. In a machine for generating the teeth of bevel-gears, the combination of a rotatable grinding-Wheel having a series of reciprocatory movements on a cone line of the gear in the operation of grinding the gear, an arbor Ato carry a gear, and an indexing device to rotate said arbor to space the teeth of the gear, substantially as set forth.

9. In a machine for generating the teeth of "bevel-gears, the combination of a rotatable grinding-Wheel reciprocatoryin the operation of grinding the gear, a device to carry a bevelgear, a lever oscillatory on a Iine passing through the cone center of the gear,and means to oscillate said lever, substantially as set forth.

10. In a machine for generating the teeth of Vbevel-gears, a device to carry a bevel-gear,

'a I'ever oscillatory on a line passing through the cone center of the gear, a former to actuate said device, and a roll carried by said lever to contact with said former, substantially as set forth.

11. In amachine for generating the teeth of bevel-gears, an arbor to carry a bevel-gear, a lever oscillated on aline passing through the cone center of the gear to move toward and away from the gear, and means to give astepby-step rotation to said arbor when said 1ever is moved away from the gear, substantially as set forth.

12. In a machine for generating the teeth of bevel-gears, an arm to actuate the arbor, a former carried by said arm, and means cooperating With said arm to actuate said arm,

` substantially as set'forth.

13. In a machine for generating the teeth of bevel-gears, a rotatable arbor to carry a bevel-gear, an index-plate rotatable With said arbor, an arm to actuate said arbor, and a former to actuate said arm, substantially as set forth.

14. In a machine,`for generating the teeth of bevel-gears, a rotatable arbor to carry a bevel-gear, an index-plate rotatable with said arbor, an arm to actuate said arbor, a former to actuate said arm, and means to lock said arm upon the index-plate, substantially as set forth.

15. In a machine for generating the teeth of bevel-gears, a rotatable arbor to carry a bevel-gear, an index-plate rotatable with said arbor, means to give a step-by-step rotation to said arbor, an arm to actuate said arbor, a former to actuate said arm, and means toIock said arm upon the ind explate after each stepby-step movement thereof, substantially as set forth.

16. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a rotatable grinding-Wheel, and means to reciprocate the grinding-Wheel on a cone line of the gear in the operation of grinding the gear, said grinding-wheel being laterally and vertically adjustable, substantially as set forth.

17. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a laterally-adjustable grinding-Wheel, and means to reciprocate the grinding-Wheel on a cone line of the gearin the operation of grinding the gear, and adjustable stops to govern the adjustment of the grinding-Wheel, substantially as set forth.

18. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a rotatable grinding-Wheel, and means to reciprocate the grinding-Wheel on a cone line of the gear in the operation of grinding the gear, a device to laterally adjust said grinding-Wheel, and means to cover said adjusting devices, substantially as set forth.

19. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear,

`of bevel-gears, the combination of means to carry a bevelgear, a grinding- Wheel, and means to reciprocate the grinding-wheel on a cone 4line of the gear in the operation of grinding the gear, said gear and grinding-wheel the one arranged to rock in relation to the other in the operation of grinding the gear to form the proper curvature of the teeth upon said gear, substantially as set forth.

21. In a machine for generating the teeth of bevel-gears, the combination of means to carry a bevelgear, a grinding-Wheel, and means to reciprocate the grinding-Wheel on a cone line of the gear in the operation of grinding the gear, said gear and grinding-Wheel the one arranged to have a rocking movement in the operation of grinding the gear to forln the IOC IIO

4a laterallyadjustable grinding-wheel, and

means to reciprocate the grinding-wheel on a cone line ofthe gearin the operation of grind ing the gear, and adj listing-screws to laterally adjust said wheel, substantially as set forth.

24. In a machine for generating the teeth of bevel-gears, the combination of a rotatable grinding-wheel, a quadrant, and an arbor to' carry a gear adjustable upon said quadrant,

rsaid arbor having a rocking movementin the operation of grinding the gear, substantially as set forth.

25. In a machine for generating the teeth of bevel-gears, an oscillatory arbor to carry the gear, and a grinding-,wheel tov act upon the teeth of the gear having a reciprocatory movement in the operation of grinding the gear, substantially as set forth.

26. In a machine for generating the teeth of bevel-gears, an arbor to carry the gear, a grinding-Wheel, reciprocatory in the operation of grinding the gear and a spindle to carry the arbor, substantially as set forth.

27. In a machine for generating the teeth of bevel-gears, an arbor, a spindle to carry the arbor having a rocking movement in the operation of grinding the gear, and a bearing to carry the spindle, said spindle ful crumed on a line passing through the cone center of the gear, substantially as set forth.

28. In a machine for generating the teeth ot' bevel-gears, a quadrant, an arbor, a spindle to carry the arbor having a rocking movement in the operation of grinding the gear,and a bearing to carry the Spindle adjustable on said quadrant, substantially as set forth.

' 29. In a machine for generating the teeth of bevel-gears, a rotatable grinding-wheel reciprocatoryin the operation of grinding a gear an arbor,an indeX-plate,and pawl-and-ratchet mechanism to actuate said plate,substantially as set forth.

30. In a machine for generating the teeth of bevel-gears, a rotatable grinding-Wheel reciprocatory in the operation of grinding a gear an arbor, an index-plate, a reci procatorylocking-plunger to lock said plate,and means to actuate said plunger, substantially as set forth.

3l. In a machine for generating the teeth of bevel-gears, a rotatable grinding-Wheel re ciprocatory in the operation of grinding a gear an arbor, an index-plate, an oscillatorylocking device, and means to reciprocate the locking` device, substantially as set forth.

32. In a machine for generating the teeth of beveLgears, a rotatable grinding-wheel'reciprocatoryin the operation of grinding a gear an arbor, an index-plate, an oscillatory arm, and a locking device carried by said arm to lock said plate, substantially as set forth.

In a machine for generating the teeth of bevel-gears, a rotatable grinding-wheel reciprocatory in the operation of grinding .a gear an arbor, and index-plate, an oscillatory locking-plunger, and a reeiprocatory slide to engage and actuate said plunger substantially as set forth.

34C. In a machine for generating the teeth of bevel-gears, a rotatable grinding-wheel reciprocatory in the operation of grinding a gear au arbor, an index-plate, pawl-and-ratchet mechanism to actuate said plate, and a :reciprocatory slide to carry said paw] ,substantially as set forth.

35. In a machine for generating the teeth of bevelgears, means to carry a gear, an `index-plate, a slide to actuate said plate, a shaft on a line passing through the cone center of the gear, a shifting device upon said shaft, a cam, and levers connecting said cam and slide with said shifting device, substantiallylas set forth. 4

36. In a machine for generating the teeth of bevel-gears, -a rotatable grinding-Wheel reciprocatoryin the operation of grinding a gear a device to carry a gear, and a toothed indexplate having` an adjustable connection. with said device to give thereto a step-by-step movement, whereby the teeth of the indexplate maybe alined with the teeth of the gear, substantially as set` forth.

37. In a machine for generating the teeth of bevel-gears, a device to carry a gear, a

former-arm to actuate said device, and an intervening arm connecting the former-arm With the gear-carrying device, substantially as described.

38. In a machine for generating the teeth of bevel-gearaa spindle to carry the gear, and an interchangeable former-arm provided With an oscillatory former engaged upon said spindle, substantially as set forth. l

39. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, means to rock said gear in the operation of the mach-ine, and an oscillatory former to actuate the gear, substantially as set forth.

40. In a machine for generating t-he teeth of bevel-gears, means to carry a gearmeans to rock said gear in the operation of the machine, a grinding-wheel, and a former to govern the position of the gear whereby the action of the Wheel will produce the correct curvature. to the. teeth of said gear, substantially as set forth.

4l. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a rotatable grinding-Wheel reciprocatory in IIO the operation of grinding a gear, an oscillatory former to govern the action of the grinding-wheel upon the gear, and a traveling device to actuate said former, substantially as set forth.

42. In a machine for generating the teeth of bevel-gears, meansto carrya bevel-gear, a grinding-wheel, a former, an oscillatory lever to carry the grinding-Wheel, and a traveling device carried by said lever to actuate said former, substantially as set forth.

43. In a machine for generating the teeth of bevel-gears, means to carry a gear, a grinding-Wheel, a former to govern the action of the grinding-Wheel upon the gear, and an oscillatory traveling device to actuate said former, substantially as set forth.

44. In a machine for generating the teeth of bevel-gears, means to carry a gear, a grinding-wheel, a former to govern the operation of the grinding-wheel upon the gear, an oscillatory traveling device to actuate said former, and means to limit the oscillation of said traveling device, substantially as set forth.

45. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a former, and a device to travel on a line passing through the cone center of the gear to actuate said former, substantially as described.

46. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a former, an oscillatory lever to carry a grinding-Wheel, an oscillatory arm carried by said lever, and a traveling device carried by said arm to actuate said former, substantially as described.

. 47. In a machine for generating the teeth y of bevel-gears,means to carry a gear, a form er,

an oscillatory lever to carry a grinding-Wheel, an oscillatory arm carried by said lever, a traveling device carried by said arm to actuate said former, and means to limit the oscillation of said arm, substantially as set forth.

48. In a machine for generating the teeth of bevel-gears, a device to carrya gear, a nonrevoluble former to actuate said device, and means to oscillate the former in the operation of grinding the gear, said former centering on a line passing through the cone centenof the gear, substantially as set forth.

49. In a machine for generating the teeth of bevel-gears, the combination of a device to carry a gear, a non-revoluble former, and means to hold the former when in normal position on a line passing through the cone center of the gear, substantially as set forth.

50. In a machine for generating the teeth of bevel-gears, the combination of 'a device to carry a gear, a non-revoluble former oscillatory in the operation of grinding the gear, a traveling device to actu ate said former, and means to hold the former in the operation of the machine in contact with said traveling device, substantially as set forth.

51. In a machine for vgenerating the teeth of bevel-gears, the combination of a device to carry a gear, a grinding-Wheel having a vertically-reciprocatory movement, a former,

.a traveling device to actuate the former, and

vertically with the grinding-wheel,and means to hold the former in contact With the traveling device and to restore the former on aline passing through the cone center ofv the gear when the traveler is raised out of contact therewith, substantially as set forth.

52. In a machine for generating the teeth of bevel-gears, the combination of a device to carry a gear, a former to actuate the gear, a traveling device to actuate the former, a guide, slides engaged with said guide, sheaves carried by said slides, a connecting-rod connected with the former to actuate said slides, a cord engaged with one of said slides and passing over said sheaves, a tension device connected with the opposite end of said cord, and a stop between the adjacent ends of said slides, substantially as set forth.

53. In a machine for generating the teeth of bevel-gears, a grinding-wheel, a device to carry the grinding-Wheel, a guide carrying said device, a reciprocatory cross-head carrying said guide, and means to limit the movement of the cross-head, substantially as set forth.

54. In amachine for generating the teeth of bevel-gears, means to carry a gear, a laterally-adjustable grinding-Wheel, a device to carry the grinding-Wheel, a guide carrying said device, a reciprocatory cross-head,means to limit the movement of the cross-head to secure the lateral adj ustment of the grinding- Wheel to bring the cutting edge of the grindl in g-Wheel upon a line passing through the cone cen-ter of the gear, substantially as set forth.

55. In a machine for generating the teeth of bevel-gears, a grinding-Wheel, a device to carry the grinding-wheel having a reciprocatory movement in the operation of grinding the gear, a guide carrying said device, a reciprocatory cross-head, screws to limit the movement of said cross-head, and means to lock said screws, substantially as set forth.

56. In a machine for generating the teeth of bevel-gears, a grinding-wheel having a reciprocatory movement in the operation of grinding the gear, and means to laterally adj ust said Wheel to bring its cutting edge upon a line passing through the cone center of the gear, substantially as described.

57. In a machine for generating the teeth of bevel-gears, a grinding-wheel having a reciprocatory movement in the operation of grinding the gear, a housing to carry said Wheel, a guide to carry said housing, a crosshead to carry said guide, a slide to carry said cross-head, and means to limit the movement of said cross-head upon said slide, substantially as described. y

5S. In a machine for generating the teeth of bevel-gears, a grinding-wheel having a reciprocatory movement in the operation of grinding the gear, a housing to carry said IOO IIO

Wheel, a guide to carry said housing, a crosshead to carry said guide, a slide to carry said cross-head, and means to engage said guide upon said erosshead, substantially as set forth.

59. In a machine for generating the teeth of bevel-gears, agrinding-wheel having a reciprocatory movement in the operation of grinding the gear,a housing to carry said Wheel, a guide to carry said housing, a crosshead to carry said guide formed with an arcshaped slot, a slide to carry said cross-head, and a bolt passing through said slot engaging said guide upon said cross-head, whereby the guide may be tilted in the arc of a circle to tilt the grinding-Wheel, substantially as set forth.

60. In a machine for generating the teeth of bevel-gears, a grinding-wheel havinga reciprocatory movement in the operation of grinding the gear, a housing to carry said Wheel, a guide to earrysaid housing, a crosshead to carry said guide, means to reciprocate the cross-head, a slide to carry said crosshead, and means to engage said guide upon said .cross-head, substantially as 'set forth.

6l. In a machine for generating the teeth of bevel-gears, a grinding-wheel having a reciprocatory movement in the operation of grinding the gear, a housing to carry said` Wheel, aguide to carry said housing, a crossi head to carry said guide formed with an areshaped slot, and a slide to carry said crosshead, said guide formed with tongues pro-` j eeting into the arc-shaped slot, substantially as described.

62. In a machine for generating the teeth of bevel-gears, means to carry a gear, a grinding-wheel reciprocatory on a cone line of the gear in the operation of grinding the gear, and means to give a vertical adjustment to the gri nding-Wheel, whereby as it reeiproeates it Will reciprocate on a line passing through the cone center of the gear, set forth. V 4

63. Iua machine for generating the teeth of bevel-gears, means te carry a bevel-gear, a grinding-Wheel having a series of reciprocatory movements on a cone line 'of the gear in the operation of4 grinding the gear, and.

means to adjust the grinding-Wheel whereby its cutting edge will be upon lines passing through the cone center ot' the gear both vertically and horizontally, substantially as set f orth.

Gat. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a grinding-\vl1eel, means to adjust the grind- .ing-wheel whereby its cutting edge Will be upon acone line of' the gear, and a testing device to test the adjustment of said wheel, substantially as set forth.

65. In a machine for generating the teeth of bevel gears, means to carry a bevel-gear, a grinding-wheel, means to adjust the grinding-wheel whereby its cutting edge will be upon acone line of the gear, and a removable substantially as bracket provided with a'straight edge to test the adjustment of the grinding-Wheel, substantially as described.

66. In a machine for generating the teeth of bevel-gears, means to carry a gear, a grinding-wheel, a lever to carry the grinding- Wheel, means to adjust the grinding-Wheel whereby its cutting edge Will be on a cone li-ne of the gear, a bracket to test the adjustment of the Wheel, and a clamping-screw engaging said bracket upon said lever, saidlever formed with V-shaped grooves to engage said clamping-screw, substantially as set forth.

G7. In a machine for generating the teeth of bevel-gears, adevice to carry a grinding- Wheel'having a reciprocatory movement in the operation of grinding the gear, said device fulcrumed on a line passing through the cone center of the gear, substantially as set forth.

68. In a machine for generating the teeth of bevel-gears, a grinding-wheel, means to reeiprocate the grinding-Wheel on a cone line of the gear in the operation of grinding the gear, and means to bring the edge of the grinding- Wheel into Vcontact With the teeth of the gear on a line passing throughthe cone `center of the gear, substantially asdescrib'ed.

69. In a machine for generating the teeth of. bevel-gears, means to carry a bevel-gear, and a rotatable grinding-wheel reciprocatory on acone line of the gear in the operation of grinding the gear, substantially as set forth.

7 0 In a machine for generating the teeth of bevel-gears, means. to carry a bevel-gear, and a rotatable grinding-Wheel, means to reciproeate the grinding-Wheel on a cone line of the gear in the operationof grinding the gear, the means to carry the bevel-gear having a rocking movement in the Operation of grinding the gear, substantially as set forth.

7l. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a rotatable grinding-Wheel and means to reciprocate the grinding-Wheel on a cone line of the gear in the operation of grinding the gear, the means to carry the bevel-gear having a stepby-step movement, substantially as set forth.

72. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a grinding-wheel, means to give to the grinding-wheela series of reciprocatory movements von a cone line ot' the gear in the operation of grinding the gear, and means to adjust the grinding-Wheel both vertically and horizontally,whereby its euttin g edge Will reciprocate on a cone line of the gear-teeth, substantially as described.

73. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a grinding-Wheel arranged to have one lateral edge of its.periphery aetuate upon the gear upon the cone line of the gear, and means to give to the grinding-Wheel'a series of reciprocatory movements ona cone line of the gear in the operation of grinding the gear, substantially asset forth.

IIO

74. In a machine for generating the teeth of bevel-gears, means to carry a bevel-gear, a lever oscillatory on a line passing through the cone center of the gear, a grinding-Wheel carried by said lever, means to give to said grinding-Wheel a series of reci procatory movements on a cone line of the gear in the operation of grinding the gear, substantially as set forth.

75. In a machine for generating the teeth of bevel-gears, a grinding-Wheel, a device to carry the grinding-Wheel, a guide carrying said device, a reciprocatory cross-head carrying'said guide, and means to limit the movement of the cross-head, said grinding-Wheel having a reciprocatory movement in the operation of grinding the gear, substantially as set forth. i

76. In a machine for generating the teeth of bevel-gears, a grinding-wheel havinga rotary movement, means to give to the grinding- Wheel a series of reciprocatory movements on a cone line of the gear in the operation of grinding a gear and a vertical movement, substantially as set forth.

77. In a machine for generating the teeth of bevel-gears, a rotatable grinding-wheel, and a rocking device to carry a gear tobe cut, said gear and said grinding-Wheel the one having a reciprocatory movement relative to the other in the operation of generating the teeth of the gear, substantially as set forth.

78. In a machine for generating the teeth of bevel-gears, a device to carry a bevel-gear, and a rotatable grinding-Wheel having a tilting inovement'in relation to a plane passing through the center of the tooth being acted upon and through the center of the axis of said gear, said Wheel tilting from a point upon its periphery whereby its cutting edges can be brought into proper relation to said plane, substantially as set forth.

79. In a machine for generating the teeth of bevel-gears, a device to carry a bevel-gear, a rotatable grinding-wheel reciprocatory on a cone line of the gear in the operation of grinding the gear, and means whereby the grinding-wheel will produce the proper curvature and the converging outline of the teeth of the bevel-gears, substantially as set forth.

SO. In a machine for generatingl the teeth ot' bevel-gears, agrinding-wheel, means to rotate said Wheel, means to reciprocate said Wheel back and forth on a cone line of the gear at an angle to the longitudinal centerof the axis of the gear, and means to reciprocate the Wheel on a radial line passing through the cone center, substantially as set forth.

Sl. In a machine for generating the teeth of bevel-gears, a rocking device to carry a bevel-gear, and a former to govern the movement of the gear,the central line of the former being coincident with a plane passing through the center ot' the tooth being acted upon, substantially as set' forth.

In testimony whereof We sign this specilication in the presence of two Witnesses.

HENRY M. LELAND. v FRANK E. FERRIS. Witnesses:

N. S. WRIGHT, MARY HICKEY. 

